Annealed copper pipe : the technology and scope

Changing annealed copper pipes during firing

use of copper pipes in various industrial units, high pressure feed systems and pipelines with chemically active (aggressive) coolant is justified.Comparable with annealed copper pipes technological characteristics have only high-quality products made of brass, and then not always.

According to GOST 617-2006 (modern version) Copper tubes of circular cross section are normalized as follows:

• have seven varieties of raw material are defined by the presence of other chemical additives (bismuth, tin, sulfur, phosphorus, etc.) in the alloybased on copper purity of at least 99,5-99,9%;
• made by cold deformation and compression;
• admit when cold-embodiment three states: solid, semi-solid and soft.

first and last case corresponds precisely categories unfired and fired copper pipes.Specifications, features of forming, sizes finished pipe sections and thus their field of application vary considerably.

The process of annealing copper pipes is simple and familiar to many people who tried to ignite a fire or steel wire mesh.Ready Pipe rolling along the entire length is heated to 650-700 degrees (for reference: the melting point of copper in 1083) and is cooled (released).

What gains and loses in terms of technical parameters of the annealed copper pipe after such a straightforward procedure:

• plasticity of the material is increased about 1.5 times, however, by reducing the mechanical strength of from 340 to 210-220 MPa;
• response to the linear stretch of pipeline spreading room is getting better, the possibility of transverse deformation increases;
• Tube rental is possible to cut lengths of sections and rolled into the bay;transportation advantages, storage and installation of pipes of annealed copper as compared with unannealed segments dimensional evident.

Scope burnt copper pipes

The unique properties of the pipe rolled copper after annealing open to planners and designers limitless possibilities, especially if you remember about the original specifications of the material stored in these products:

1. annealed copper pipes, which carried holiday inert compounds, acquire additional anti-corrosion qualities.Moreover, such tubes can operate over a wide temperature range (in the range - 200 to + 250 degrees) with the internal active chemical carriers (up to acids and alkalis).
2. internal hydraulic impact resistance pipes with proper installation is extremely high, so those who are made of copper plumbing tubes produced in a timely manner or the installation of the heating system made of copper, we sincerely envy.
3. Ease of installation work: conventional soldering (gas burner and flux) or prolonged regular fittings and a wrench.

Quite naturally, annealed copper tubes are widely used in industrial and narrow-minded field, here are some of them:

• household domestic water supply (especially hot) and heating, with a high operating pressure and temperature;
• outer liner network of pipelines to private homes;
• air-conditioning system, where seamless copper tubes are indispensable;
• refrigeration equipment, the production of cars, etc.

traditional question. What the disadvantages of such tubes

Unfortunately for us, they are.Two negative parameter such products: a large proportion is not always lift the price we have already discussed, therefore, turn to the manual.

that of annealed copper pipes run any wiring configuration, which can even be in a hurry to make a bender with your hands - is remarkable.But just as easily this pipeline system will be deformed under any external mechanical influences.Frying pan fell hammer accidentally touched, and a settlement section anymore.

Copper has a very high thermal conductivity.In the high-temperature heating networks use non-insulated piping is unsafe.The same can be said about the electrical properties of the material.Posting of annealed copper pipes with unreasonable grounding conductor becomes beautiful and has a master's hand.

Nevertheless, we must acknowledge that copper, in any technological performance - a solid, reliable, durable, and very beautiful.